The boiler is of the round bottom fire box or locomotive style, has the dome in front, and the ash pan is in the lower part of the fire box.
It is mounted upon the traction wheels by brackets attached to the rear end of the boiler, which contain the main axle. The front end rests upon a trussed axle.
The traction wheels are high, and are of the wrought iron rim direct spoke type. The loose traction wheel is furnished with a locking device for securing it to the axle.
In the arrangement of the engine and the high traction wheels, the driving or band wheel is placed between one of the traction wheels and the boiler. The necessary fittings are furnished with both boiler and engine to keep them in good running order and perfectly safe if properly handled.
Rumely Traction Engine.
LINK.
The Link is that part which holds the link block and is connected at each end to the eccentric rods; it is used only on reversing engines. The link is made on a curve, so that when the link block is at either extreme end the valve is operated to its full movement. When the block is in the center of link, the valve covers both ports and prevents the ingress of steam to the cylinder.
The Link Block is attached to the slide which connects it to the valve rod. The valve rod connects the slide and valve, and where it enters the steam chest is packed in like manner to the piston rod.